Automatically-threading shuttle



lowing replenishment.

Patented Oct. 27, 1925.

UNITED sTATEs "PATENT OFFICE.

HENRY D. MARTIN, or GRIFFIN, GEORGIA, AssIGNoR-To DRARER CORPORATION, or HOPEDALR, MASSACHUSETTS, A CORPORATION or MAINE.

AUTOMATICALLY-THREADING SHUTTLE.

Application led Ju1y`8, 1 925.` Serial No. 42,122.

To all whom t may concern.'

Be it known that I, HENRY D. MARTIN, a citizen of the United States, and a resident of Griffin, `in the county lof Spalding andv State of Georgia, have inventedan Improvement in Automatically-Threading Shuttles, of which the following description, in connection with the 'accompanying drawings, is a specification, like` characters on the drawings representing like parts. n

This invention relates to shuttles and more particularly to self-threading shuttles' provided with a friction tension means for imparting tension to the threadY during weaving.v f

Shuttles have heretofore .beeny provided with various types of tension means f or` eX- erting the desired tension on the thread during weaving, but in shuttles of the auto-l matically-threading type it has been found that the character and location of the thread tension means must be such as not to interfere with the automatically vthreading portion of the shuttle on the pick thereof fol- Any tension means that would prevent the free swirling action of the thread on its first pick following ,replenishment yis liable to cause a failure of shuttle threading and may result in breakage of the thread when the shuttle ,is picked. 'f n It is often desirableV to vary thetension of the thread, and this is especially observable when ydifferent'lrinds or characters of filling are employed. `'One of the objects Vof the present invention, therefore, is -to .provide a lfriction tension, preferably inthe form of a pad of textile material or felt, or like sub# stance, whichv may be so positioned relative to `the automatically threadingA features of theV shuttle as not Vto interfere therewith,l

andyet provide,l proper tension on the thread after the shuttle Vhas been properly threaded. A still further ,object of the inventionis to provide a friction padr or tension vdevice of the general character described, which may be readily adjustedto vary the'tension on vthe thread in accordance with the character of the thread in use. y v 1 The above and other`` novel features of the invention will best be made clear` froml the followingV description and theV accompany- .ing drawings of one good form thereof.

In the drawings:

Fig. l is a plan view of an automatically vthreading shuttle provided with the and n present invention;` y v Fig. 2 isa. detailed Iperspective view on an enlarged scale showing a threading block provided with thetension device of the pres ent invention; a. t I H Fig. 3 is a side elevation of the threading block on an enlarged scale, showing a modi- 'fied form of the invention; L f

.'Fig. ifis a detached .detail showing'the split ferrule which may be employed for hold'iingithejv tension pad indifferent posiA tions.` for vvarying the tension on vthe yarn;

- .Fig.5.is a still further modification showinganother means for holding the pad in adjusted position .forvaryingthetension.

In automatically threadings'huttles wherein preliminary threading is eected on the first pick of the shuttle after replenishment,

the. thread is withdrawnfrom the fillingcar- .rier' or bobbin in the shuttle as the shuttle 1s picked on the first flight of the shuttle` fol-V lowing replenishment, and one of thejpurposes of the presentinvention is to utilize the .swirling action of the thread to effect preliminary threading, and yet provide in connection with such automatically threading shuttle a tension pad which will not interfere with the preliminary threading and will at thel same time present the desired frictional tension Yon the thread during sub sequent weaving afterthe shuttle has been fully threaded. Y f

:In the drawings, the shuttle l is provided with the usual bobbin chamber 2 in which the filling carrier 3 isdetachably supported in a manner now well understood in the art. Frontward ofthebobbin chamber the shuttleis provided with a threading blocl; y receiving chamber .4 in `which the threading block. is secured, preferably' by Ameans'of an opening Lor holeA extending ytransversely throughv the ythreading block and engaged by the lusual lcross bolt. The threading block has the longitudinally4 eX- tending thread passage 7 openatits'top and rlaterally thereof is theside delivery'eye of the shuttle, as at 8. l l

y The threading block ashereinshown is of the general type shown and described more fully in the patent to Edward S. Stimpson, No. 1,538,224,jdated May 19, 1925. That is, it is'preferably formed of cast iron, having a smooth, rust-,resisting surface which offers no impediment to the free passage of the thread. IVhile the present invention is especially advantageous in use with the threading block shown and described in the Stimpson patent mentioned, itv might also be employed in connection with other forms of threading blocks for automatically threading shuttles.

In the present; instance the tl'ireading block in addition to the open threading slot 7, has a thread director 9, the end portion of which extends transversely of but does not entirely cross the thread passage, and is also provided with a thread guide or bridge 11 at the forward end of the longitudinally extending thread passage over which the thread c passes on its way to the side delivery eye.

In accordance with the present invention,

1 a friction pad extends transversely of the longitudinally extending thread passage at the front portion thereof below the bridge, as shown, so that during preliminary threading, the swirling action of the thread finds Y noY obstruction by contact with the tension pad.

The tension pad 12 is arranged transversely of th-e longitudinally extending thread passage and, as indicated in Fig. 2., the threading block may be provided with a transversely extending opening or recess 13 below the` bridge, in which the body portion of the friction pad 12 may be held.

Then the tension pad' of the present in- 7 vention is employed in connection with a threading block having a bridge over which the thread passes on its way to the side delivery eye, the pad is preferably located front'ward or forwardof the bridge, being secured in place below the bridge to engage the thread on its way to the side delivery eye so that tensionflis applied to the thread between the longitudinally extending thread passage and the side delivery eye.

'l lhere the tension pad' is formed' and held as indicated in Fig. 2, the body portion 1st` of the padv will be compressed and pushed transversely into the opening 18 in the threading block., while the tension portion of' thepad forward of the bridge extends transversely of the thread' passage and is l0- cated in front of' and below the bridge, as indicatedin Figs. 1 and 2.

Ililhen the character of filling is changed in the shuttle orV a` different tension is desired', the pad, as indicated in Fig. 2, may be turned in the transverse opening 13 about its transversely extending axis, with the result that the tensioning lportion of the pad will be raised nearer to the top surface of the bridge and perfor-ce act more energetically upon the thread on its way fromv the thread passage to the side delivery eye..

In Fig. 3, the threading block 5, which is shown of 'substantially the same character as that of Figs. 1 and 2, has the transverse opening 13 occupied by the split ferrule 15 in which the pad or friction material 12 is held. The ferrufle 15 extends transversely of the threadpassage and is preferably coincident in length with the transverse length of the tension pad. and may be held in the opening 13 of the threading block by friction-al engagement of the walls of the split ferrule 15 with the walls of the opening. The ferrule 15,A asV indicated in Figs. 3J and t, is provided atV one edge with notches or recesses 16 by which the ferrul'e may be conveniently turned to vary the positionl of the pad' about its axis extending transversely of the thread passagel to thereby vary the tension that may be'a'pplied to, the thread be tween the longitudinally extending thread passage and side delivery eye.

The ferrrule 15, as hereinbefore stated, has the split portion 17 and may be convenient-ly formed of spring metal, so that when the pad 12I is placed within the ferrule, the projecting portion of the pad, astindicated in Fig. 3, may be raised or lowered', and consequently vary the tension of the thread by turning the ferrule about its axis extending transversely of the thread passage.

In Fig. 5' the threading block may be of the same general type as those already described or of any other type, and instead of making the transverse opening 13 in the threading block below the thread passage, the threading block may be provided with a recess 18, in which the pad of flexible inaterial, such as. felt, may be securedV by the block 19 having the complemental recess 2t), and held to the block by a screw or other fastening means, as 21.` As indicated in Fig. 5', the'block 9 has a bea-ring shoulder portion 2 2 which bears against an abutment on the threading block, so. that upon setting up. the, screw 21, the pad of frictional ma' terial may be securely held in place and in any desired position of adjustment for vary-- ing the tension exerted upon the thread between the longitudinally'extending thread passage and the side delivery eye. rIhe pad itself, as.. indicatedin Fig'- 5, is formed of two. layers of friction material 23 and 24 which may be either pieces of felt or woven fabric, one upon the other, as indicated i'n Fig. 5. The pad shown and described with respect to the remaining figures of the drawings may be similarly formed of textilematerial, either woven or felted, or indeed, any suitable friction pad construction.

From the construction described it will be apparent that the friction pad, by reason of its position relative to, the automatically threading block, offers no obstruction to the swirling action of the thread during preliminary threading following replenishment of filling, and asserts itself mainly when the lOO shuttle has become fully threaded and the thread passes from the longitudinally extending thread passage to the side delivery eye. So, also, when different kinds of filling are employed, and it is desired consequently to vary the tension of the thread, the pad may be adjusted about its axis extending transversely of the thread passage to present more or less of the pad to actively tension the thread on its vwav to the side delivery eye.

What is claimed is: i

l. In an automatically threading loom shut-tle, the combination of a threading block having a longitudinally extending thread passage, a bridge over which the thread passes to the side delivery eye, and

' a thread tension pad extending transversely of a thread passage frontward of and a substantial distance .below the bridge to engage and tension the thread as it is deflected downwardly from the bridge towards the side delivery eye.

2. In an automatically threading loom shuttle, the combination of a threading block having a longitudinally extending vthread passage, a bridge over whichv the thread passes to the side delivery eye, a thread tension pad extending transversely of the thread passage frontward of the bridge to engage and tension the thread between the thread passage and side delivery eye, and means permitting the tension pad to be moved to present more or less tension surface to the thread.

3. In an automatically threading loom shuttle, the combination of a threading block having a longitudinally extending thread passage with a bridge at the forward end thereof and provided with a transversely extending pad holding recess below the bridge, and a tension pad which is held in said recess by the engagement of the pad therewith to tension the thread below the bridge between the longitudinally extending thread passage and side delivery eye.

4f. In an automatically threading loom shuttle, the combination of a threading block having a longitudinally extending thread passage, a tension pad extending transversely of the thread passage at ythe forward -end thereof over which the thread isdrawn towards the side delivery eye, and means for holding the tension pad in different positions of adjustment to vary the amount of frictional pad surface presented to the thread on its way to the side delivery eye.

5. An Lautomatically threading loom shuttle having a longitudinally extending thread passage and side delivery eye, a tension pad extending transversely of the thread passage at the frontward end thereof fortensioning the thread between lthe thread passage and side delivery eye, and means for holding the tension pad in different positions of rotative adjustment about its transversely extending axis to vary the tension on the thread.

6. An automatically threading loom shuttle having a longitudinally extending thread passage and side delivery eye, a tension pad extending transversely of the thread passage at the frontward end thereof for tensioning the thread between the thread passage and side delivery eye, and a split ferrule for holding the pad in different positions of rotative adjustment about its transversely extending axis to vary the tension on the thread.

In testimony whereof, I have signed my name to this specification.

, HENRY D. MARTIN. 

